How can we understand if the value inside a String is an int or not in Python?

Question

I am writing a code where I am facing the problem and need a solution if it exists. Suppose we have a following String type variable in Python which contains an integer value. Eg:x='123' I know that we can easily convert this by type conversion to int. However, suppose we have the following list.

x=['123','Spain']

Is there any method in Python by which I can know which element of the list x is Integer contained inside a string and which is purely an Object?

https://docs.python.org/3/library/stdtypes.html#str.isdecimal — jonrsharpe, Jul 17 '20 at 14:13
Yes, there is a method. Please provide a sample input with e.g. 5 values and expected output (it is not clear if you mean items, indices, ...) — Jan Stránský, Jul 17 '20 at 14:14

CMinusMinus · Accepted Answer · 2020-07-17T14:16:43.970

0

I would recommend this method:

x = "123"
if x.isdigit():
    # int
elif x.replace(".","",1).isdigit():
    # float
else:
    # str

edited Jul 17 '20 at 14:16

answered Jul 17 '20 at 14:13

CMinusMinus

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`elif x.replace(".","").isdigit():` this I don't like, consider e.g. `"1.2.3"`. Is it float? – Jan Stránský Jul 17 '20 at 14:15

score 0 · Answer 2 · answered Jul 17 '20 at 14:22

0

I assume you have similar question with this post.

But, from my perspective, for more general solution (language agnostic), you should learn more about Regular Expression, here also the same question

answered Jul 17 '20 at 14:22

el hafizh hidayat

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How can we understand if the value inside a String is an int or not in Python?

2 Answers2